1145663189 has 8 divisors (see below), whose sum is σ = 1304154432. Its totient is φ = 996228640.

The previous prime is 1145663177. The next prime is 1145663191. The reversal of 1145663189 is 9813665411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1145663189 - 2⁴ = 1145663173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145663089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2263904 + ... + 2264409.

It is an arithmetic number, because the mean of its divisors is an integer number (163019304).

Almost surely, 2^1145663189 is an apocalyptic number.

It is an amenable number.

1145663189 is a deficient number, since it is larger than the sum of its proper divisors (158491243).

1145663189 is a wasteful number, since it uses less digits than its factorization.

1145663189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4528347.

The product of its digits is 155520, while the sum is 44.

The square root of 1145663189 is about 33847.6467276530. The cubic root of 1145663189 is about 1046.3708995102.

The spelling of 1145663189 in words is "one billion, one hundred forty-five million, six hundred sixty-three thousand, one hundred eighty-nine".